反应详情

A mixture of 6-acetoxy-2-naphthoic acid (1 g, 4.34 mmol, 1.0 eq), methyl piperidine-4-carboxylate (684 mg, 4.78 mmol, 1.1 eq), HBTU (2.47 g, 6.51 mmol, 1.5 eq) and TEA (658 mg, 6.51 mmol, 1.5 eq) in DCM (20 mL) was stirred at room temperature for 16 h. The reaction mixture was diluted with ethyl acetate (200 mL). The combined organic layers were washed with water (100 mL*2) and brine (100 mL), dried over Na2SO4 and concentrated to give methyl 1-(6-acetoxy-2-naphthoyl)piperidine-4-carboxylate as a yellow oil (2 g, yield: 100%). ESI-MS: 356.0 (M+H)+. 1HNMR (400 MHz, DMSO-d6) δ: 8.05 (d, 1H), 8.01-7.96 (m, 2H), 7.73 (s, 1H), 7.53-7.51 (m, 1H), 7.40-7.37 (m, 1H), 3.63 (s, 3H), 3.18-2.95 (m, 2H), 2.71-2.65 (m, 3H), 2.34 (s, 3H), 1.97-1.76 (m, 2H), 1.61-1.50 (m, 2H).

1. washThe combined organic layers were washed with water (100 mL*2) and brine (100 mL)
2. dry with materialdried over Na2SO4
3. concentrationconcentrated